For Salah The TWS/RWS modules from rentron.com are an excellent way to go. I have used them both with Stamp and PIC. Right now I have one set controlling a remote TV camera and another set continuously transmitting real time to my model train setup. Very inexpensive modules and easy to implement. Sid -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body